John Nassos

John Nassos

John Nassos

Vice President and Corporate Secretary

John Nassos serves as Vice President and Corporate Secretary for NiSource. His responsibilities include corporate governance, securities law compliance, and legal support for corporate finance, other corporate legal matters and commercial transactions.

John joined NiSource in 2009 as Vice President and Deputy General Counsel, Commercial, leading a team of lawyers responsible for all commercial, real estate and energy transactions. In 2015, he assumed additional responsibilities overseeing legal support for corporate finance and several other corporate functions.

Prior to joining NiSource, John was a partner in the Chicago law firm Ungaretti & Harris LLP, where he served as Chair of the firm’s Publicly Traded Securities Group and Co-Chair of its Energy and Clean Tech Industries Group.

Prior to Ungaretti & Harris, John was a partner in the Chicago office of McGuireWoods LLP, a national law firm, advising clients on energy transactions, corporate and project finance, joint ventures, mergers and acquisitions.

Prior to McGuireWoods, John worked for more than 11 years in the Legal Department of Peoples Energy Corp., a gas distribution company serving Chicago and its suburbs. He held positions of increasing responsibility, eventually serving as Assistant General Counsel and Assistant Secretary responsible for corporate governance and securities law compliance, as well as legal support for energy trading, energy project development and acquisition transactions.

John began his career as a corporate and securities associate in the Chicago office of McDermott Will & Emery LLP, a national firm. He earned his law degree from Northwestern University School of Law and graduated magna cum laude from Indiana University with a bachelor’s degree in finance.